明确的引起病毒性肝炎的病毒包括甲、乙、丙、丁、戊五种肝炎病毒,其他嗜肝病毒,如TT病毒,没有明确的致病作用。嗜肝病毒感染的一个重要特征是其种属特异性,病毒与宿主细胞特异受 The specific viruses that cause viral hepatitis include five hepatitis A, B, C, D and E hepatitis viruses and other hepadnaviruses, such as the TT virus, without a clear pathogenic role. An important feature of hepadnavirus infection is its species-specific, viral-host-cell-specific